Device for pre-stressing a wheel bearing

Abstract

A clamping device ( 1 ) for receiving and for the clearance-free prestressing of a wheel bearing comprises a clamping mechanism ( 3 ) which radially prestresses the wheel bearing ( 8 ) from the outside.

1. A device for prestressing a wheel bearing, comprising an arbor rotating at least at times about a rotational axis of the wheel bearing with respect to a clamping mechanism, wherein the clamping mechanism prestresses the wheel bearing in the device and wherein the arbor sets into rotational motion about the rotational axis of the wheel bearing a flange rotatably supported in an outer ring of the wheel bearing, at least at those times when the wheel bearing is prestressed in the device, wherein the clamping mechanism is disposed rotationally fixed with respect to the device and for prestressing the wheel bearing in the device is movable from outside radially in the direction of the rotational axis against the outer ring, the clamping mechanism is adaptive to outer rings differing from one another in their outer diameter by means of at least one thin-walled as well as elastically deformable intermediate ring developed as a hollow cylinder, radially between the clamping mechanism and the outer ring. 
   
   
     2. A device of  claim 1 , wherein a clamping mechanism elastically prestresses the outer ring. 
   
   
     3. A device of  claim 1 , wherein the clamping mechanism, with rotating arbor is radially movable against the outer ring so that it has prestressing action. 
   
   
     4. A device of  claim 1  wherein a close-clamping force of the clamping mechanism acting radially on all sides of at least 10 to 30 kiloNewtons with which the wheel beating can at least be elastically prestressed. 
   
   
     5. A device of  claim 1  wherein a circumferentially uniform radial clamping stroke of the clamping mechanism of at least 25 micrometers. 
   
   
     6. A device of  claim 1  wherein the rotating arbor is connected form-fittingly with the flange. 
   
   
     7. A device of  claim 1  wherein the rotating arbor is connected force-fictionally with the flange. 
   
   
     8. A device of  claim 1  wherein between the rotating arbor and between the flange driven by means of the rotating arbor at least a circumferential torque one Newton meter can be transmitted. 
   
   
     9. A device of  claim 1  wherein the rotating arbor engages a hollow cylindrical section of the flange developed integrally with the flange. 
   
   
     10. A device of  claim 1  wherein the rotating arbor engages a hollow cylindrical section of the flange developed integrally with the flange and that the rotating arbor is laid out such that it is adaptive with respect to differing inner diameters of the section. 
   
   
     11. A device of  claim 1  wherein the arbor is cardanically suspended in the device such that it is radially inclinable and centrally centerable, whereby the position of the center axis of the arbor is adapted to the position of the rotational axis of the wheel bearing. 
   
   
     12. A device of  claim 1  wherein the device comprises at least one axial stop fixed with respect to the device, against which the outer ring abuts axially before a clamping closure of the clamping mechanism and is aligned. 
   
   
     13. A device for prestressing a wheel bearing, comprising an arbor rotating at least at times about a rotational axis of the wheel bearing with respect to a clamping mechanism, wherein the clamping mechanism prestresses the wheel bearing in the device and wherein the arbor sets into rotational motion about the rotational axis of the wheel bearing a flange rotatably supported in an outer ring of the wheel bearing, at least at those times when the wheel bearing is prestressed in the device, wherein the clamping mechanism is disposed rotationally fixed with respect to the device and for prestressing the wheel bearing in the device is movable from outside radially in the direction of the rotational axis against the outer ring, the clamping mechanism comprises several clamping jaws uniformly distrubuted on the circumference about the rotational axis, and wherein the clamping jaws are movable synchronously and radially from the outside in the direction of the rotational axis and therein the outer ring at least partially is coustrictable by the clamping jaws at least elastically, decreasing the diameter and each of the clamping jaws is separated by a gap from a circumferentially adjacent clamping jaw which gap is filled with an elastic material, wherein the adjacent clamping jaws are circumferentially connected by the elastic material. 
   
   
     14. A device of  claim 13 , wherein each clamping jaw is secured stationarily on the device to the rotating arbor with a lever. 
   
   
     15. A device of  claim 14 , wherein the lever is secured on a side facing away from the flange on the clamping jaw and that the lever is therein fixed on the device axially away from the clamping jaw. 
   
   
     16. A device of  claim 13 , wherein the clamping jaws are acted upon by means of at least one clamping element radially in the direction of the rotational axis. 
   
   
     17. A device of  claim 16 , wherein the clamping element is disposed concentrically to the clamping jaws and is therein a rigid clamping ring encompassing the clamping jaws outside as well as circumferentially closed, wherein the clamping ring comprises an inner cone and is displaceable relative to the clamping jaws and therein axially aligned with the rotational axis against the clamping jaws and wherein the inner cone is radially outside in contact on the clamping jaws at least in sections and therein the clamping jaws are movable perforce radially inwardly by means of the axially movable clamping ring. 
   
   
     18. A device of  claim 16 , wherein the clamping element is at least one hydraulic pressure chamber circumferentially encompassing the clamping jaws about the rotational axis, wherein the pressure chamber is filled with an hydraulic pressure fluid as well as is formed to be elastically flexible radially inwardly and at least rigid radially outwardly and wherein the clamping jaws are movable perforce radially inwardly by means of the pressure chamber.